build: upgrade to Go 1.26.2 to fix CVEs

[nacx]

Description

Go 1.25.9 and 1.26.2 fix several low CVEs and one high one. This PR upgrades to Go 1.26.2.

Related Issues/PRs (if applicable)

N/A

Special notes for reviewers (if applicable)

N/A

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.38%. Comparing base (7259474) to head (d7d43e8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2042   +/-   ##
=======================================
  Coverage   84.38%   84.38%           
=======================================
  Files         130      130           
  Lines       18112    18112           
=======================================
  Hits        15283    15283           
  Misses       1883     1883           
  Partials      946      946           

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